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Performing maintenance
88 Instruction manual BFC
15
s
15.4.3 Clean heat exchanger
1. Detach the burner.
2. Clean the combustion chamber of the heat exchanger using a vacuum
cleaner and a soft brush.
3. Detach the chimney flue.
4. Clean the end of the heat exchanger using tap water.
5. Fit the burner.
6. Fit the chimney flue.
Note
Check the pressure differential again after cleaning. If the pressure
differential is too low following cleaning, please contact the supplier of the water
heater.
15.5 Finalizing
maintenance
To finalize the maintenance, carry out the following steps:
1. Fill the water heater (5 "Filling")
.
2. Start the water heater (9 "Starting the water heater")
.
3. Check the CO
2
value (3.11.3 "CO
2
adjustment").
4. Check the switching pressure of the pressure switch (3.11.4 "Switching
pressure measurement").
5. Erase the message
SERVICE REQUIRED
. The displayed message can
be reset in either of two ways:
- Temporary reset
: To postpone the message, press once. The
message will reappear on the display 7 days later.
-Full reset: To fully reset the message, press and hold both
and at the same time for 5 sec.
On completion of the full reset of the message, the message below will
appear on the display. This message will NOT be shown after a temporary
reset of the message..
RESET
SERVICE INTERVAL
SUCCESFUL
88


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